Multiple phase transitions and magnetoresistance of HoFe4Ge2

JOURNAL OF ALLOYS AND COMPOUNDS

卷:631

Article

Liu, J.¹ 

[1] Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA

关键词: Rare earth intermetallics;    Magnetic properties;    Heat capacity;    Electrical resistivity;    Magnetoresistance;   

DOI  :  10.1016/j.jallcom.2014.12.150

来源: Elsevier

【 摘 要 】

A systematic study of the structural, magnetic, heat capacity, electrical resistivity and magnetoresistance properties of HoFe4Ge2 has been performed. The temperature dependencies of the magnetization and heat capacity show three magnetic transitions at T-N = 51 K, T-f1 = 42 K, and T-f2 = 15 K. The high temperature transition is antiferromagnetic ordering and the two low temperature phase transitions are due to rearrangements of the magnetic structure. A kinetically arrested phase is observed below a freezing point of similar to 11 K. Below 35 K, the behavior of the isothermal magnetization reflects a first- order metamagnetic phase transition. Multiple phase transitions are also manifested in the electrical resistivity behavior. For a field change of 30 kOe, a large magnetoresistance of similar to 30% is observed near T-f2 (15 K). (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free